using VoxelEngine.World.Blocks;

namespace VoxelEngine.World.WorldGen.Biomes;

public sealed class PlainsBiome : IBiome
{
    private readonly FastNoiseLite _detail;

    public string Name => "Plains";
    public SurfacePalette Surface { get; }

    public PlainsBiome(int seed, BlockRegistry blocks)
    {
        this._detail = new FastNoiseLite(seed + 100);
        this._detail.SetNoiseType(FastNoiseLite.NoiseType.OpenSimplex2);
        this._detail.SetFrequency(0.02f);
        this.Surface = new SurfacePalette(blocks.Grass, blocks.Dirt, blocks.Stone);
    }

    public float SampleHeight(NoiseSource noise, float worldX, float worldZ)
        => WorldConstants.SeaLevel + 24f * noise.Continent(worldX, worldZ)
                                   + 8f * this._detail.GetNoise(worldX, worldZ);

    public IBlock TopBlock(int worldY) => this.Surface.Top;
}